Thickness dependence of the effective damping in epitaxial Fe3O4/MgO thin films
Citation:
Serrano-Guisan, S., Wu, H. C., Boothman, C., Abid, M., Chun, B. S., Shvets, I. V., Schumacher, H. W., Thickness dependence of the effective damping in epitaxial Fe3O4/MgO thin films, Journal of Applied Physics, 109, 1, 2011, 013907-Download Item:
Thickness dependence of the effective damping in epitaxial Fe3O4-MgO thin films.pdf (Published (publisher's copy) - Peer Reviewed) 1016.Kb
Abstract:
The precessional magnetization dynamics of high quality epitaxial magnetite (Fe3O4) thin films growth on MgO are investigated by inductive magnetization dynamic measurements in time and frequency domain. An upper bound for the intrinsic Gilbert damping parameter of alpha(0) =0.037 +/- 0.001 is derived, which is significantly lower than previously reported for epitaxial Fe3O4 on GaAs. With increasing film thickness from 5 up to 100 nm a strong increase in the effective damping up to 0.2 is observed which cannot be explained by simple nonuniform spin wave excitations. Possible origins of this effect are discussed. (C) 2011 American Institute of Physics. [doi:10.1063/1.3531989]
Sponsor
Grant Number
Science Foundation Ireland (SFI)
Author's Homepage:
http://people.tcd.ie/ivchvetshttp://people.tcd.ie/wuh2
Description:
PUBLISHED
Author: WU, HAN-CHUN; SHVETS, IGOR
Type of material:
Journal ArticleCollections:
Series/Report no:
Journal of Applied Physics109
1
Availability:
Full text availableKeywords:
magnetisation, dynamics, spin-valve, oxide, magnetoresistance, permalloy, behaviour, waves, ironSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.1063/1.3531989Licences: